
B6 1-4 前測
Quiz
•
Chemistry
•
9th Grade
•
Practice Problem
•
Hard
chungtsen chen
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
附圖為以碳棒為電極的電解硫酸銅水溶液之實驗裝置,則下列敘述何者正確?
在甲碳棒附近會有氫氣產生
經一段時間後,乙碳棒質量會增加
若改以銅棒作為電極,則硫酸銅水溶液濃度會增加
反應一段時間後,水溶液顏色會變紅
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
利用電解法將水(H2O)分解成氫氣(H2)與氧氣(O2),則正確而完整的化學反應式為何?
H2O → H++OH-
H2O → O2+H2
2H2+O2 → 2H2O
2H2O → 2H2+O2
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
以碳棒當電極來電解硫酸銅水溶液,下列敘述何者錯誤?
正極有氧氣產生
溶液中的 Cu2+向負極移動
整個溶液一直保持電中性
碳棒更換為銅棒,兩極反應變化仍舊不變
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
以碳鋅電池為電源做電解水的實驗,欲使得到氣體的情況如圖所示,則線路的接法正確的為何?
A 接乙,B 接丙
A 接丙,B 接丁
A 接甲,B 接丁
A 接甲,B 接丙
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
欲於剪刀上電鍍一層銅,則下列敘述何者錯誤?
剪刀應置於負極,銅片置於正極
負極的反應是 Cu2++2e-→ Cu
電鍍液可用 CuSO4 溶液,因為它含有欲鍍上的金屬離子
負極使 Cu2+逐漸消耗,故 CuSO4 的濃度漸漸降低,顏色亦逐漸變淡
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如圖,有三個電解槽同時進行電解、電鍍,圖中 a、b、c、d 等四個電極材料為碳棒,e 為鐵棒,f 為銅片,則質量變化何者正確?
a、d 質量漸增
b、f 質量漸減
c、e 質量漸增
c、f 質量不變
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
以鋅銅電池當電源電解水,裝置如圖所示,若甲、乙都是碳棒,且把 NaOH 水溶液改成 CuSO4 水溶液,則反應時下列敘述何者正確?
甲沒有反應,乙有金屬析出
甲有金屬析出,乙產生氣體
甲產生氣體,乙有金屬析出
甲、乙都有金屬析出
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